20541607859772 has 18 divisors (see below), whose sum is σ = 51924619867848. Its totient is φ = 6847202619912.

The previous prime is 20541607859771. The next prime is 20541607859789. The reversal of 20541607859772 is 27795870614502.

20541607859772 is a `hidden beast` number, since 2 + 0 + 541 + 6 + 0 + 7 + 85 + 9 + 7 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541607859771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285300109128 + ... + 285300109199.

Almost surely, 2^{20541607859772} is an apocalyptic number.

It is an amenable number.

20541607859772 is an abundant number, since it is smaller than the sum of its proper divisors (31383012008076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20541607859772 is a wasteful number, since it uses less digits than its factorization.

20541607859772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570600218337 (or 570600218332 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 63.

The spelling of 20541607859772 in words is "twenty trillion, five hundred forty-one billion, six hundred seven million, eight hundred fifty-nine thousand, seven hundred seventy-two".